A developer who hopes to build a casino on the New Bedford waterfront is criticizing a decision by the Massachusetts Gaming Commission that gives the Mashpee Wampanoag tribe until mid-March to make some progress clearing federal gaming hurdles.

Barry Gosin, principal of KG Urban Enterprises Inc, sent the commission a letter Dec. 27 criticizing the commission’s decision as being “arbitrary” and asking for immediate reconsideration when the panel begins meeting again tomorrow.

The commission had considered opening up Southeastern Massachusetts, known as Region C in the state legislation that authorized casinos, but delayed that for three months while the tribe continues to renegotiate a compact with Gov. Deval Patrick and seeks to have land taken into federal trust for a $500 million Indian casino in Taunton.

“It seems clear that the Commission's decisions and public statements regarding the Region C question have had the unfortunate effect of further discouraging any future commercial interest or investment in Region C, instead reinforcing the gaming industry's prevailing and oft-stated (to us) conclusion that the entire Southeast region of the Commonwealth is `wired for the Indians,’ “ Gosin wrote.

Despite the tribe having no “legal path” to having land taken into trust, the commission delayed its decision “with Region C having fallen another three months behind the rest of the Commonwealth,” Gosin stated.

State and tribe officials had no immediate comment. Tribe leaders have previously praised the commission’s decision saying that their casino plans are well ahead of the other regions in the state because they have a host agreement in place and city voters have approved the plans.

The commission is scheduled to meet at 1 p.m. Thursday, but does not have any discussion of Region C on its agenda, according to a posting on its website. Chairman Stephen Crosby has the authority to consider items not anticipated by the time the commission’s agenda was posted.

KG Urban is already suing the state in federal court over the Expanded Gaming Act saying that the tribal preference in the legislation amounts to a “race-based, set aside” that violates the Equal Protection Clause of the U.S. Constitution.

A decision on whether to allow other parties, including the tribe, to intervene in that lawsuit is also scheduled for mid-March.